Digital calibration for multiphase oscillators

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United States of America Patent

PATENT NO 9722539
SERIAL NO

14858965

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Abstract

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A phase-locked loop circuit comprises a multi-phase oscillator having a plurality of coupled oscillators. A calibration module detects mismatches between frequency characteristics of the different oscillators in the phase-locked loop circuit during a calibration process. The calibration module then calibrates the various oscillators to compensate for the detected mismatch. Once calibrated, the phase-locked loop circuit can operate with little or no performance degradation despite the mismatch in frequency characteristics between the different oscillators.

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Patent Owner(s)

  • RAMBUS INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hekmat, Mohammad Mountain View, US 35 205
Navid, Reza San Francisco, US 24 144

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